应用HYDRUS-1D模型模拟分析PFCs在土壤中的迁移特征  

Simulation and analysis of PFCs migration in the soil column using the Hydrus-1D model

作　　者：邰托娅[1] 郑跃军[1] 王金生[2] TAI Tuo-ya;ZHENG Yue-jun;WANG Jin-sheng(China Institute for Geo-Environmental Monitoring,Beijing 100081,China;College of Water Science,Beijing Normal University,Beijing 100875,China)

机构地区：[1]中国地质环境监测院,北京100081 [2]北京师范大学水科学研究院,北京100875

出　　处：《农业环境科学学报》2018年第10期2175-2182,共8页Journal of Agro-Environment Science

基　　金：中国地质调查局地质调查项目:全国地下水和地面沉降信息系统建设(DD20160299)~~

摘　　要：为探明全氟化合物(PFCs)在土壤中的迁移转化规律,为PFCs地下水污染防治提供依据,以全氟丁酸(PFBA)、全氟己酸(PFHxA)、全氟庚酸(PFHpA)、全氟辛酸(PFOA)、全氟壬酸(PFNA)和全氟辛基磺酸(PFOS)等6种PFCs作为研究对象,在室内设置一维土柱实验模拟PFCs在土壤中的迁移过程,采用Hydrus-1D模型建立土壤水流和溶质运移数值模型,对PFCs在土柱中的迁移过程进行模拟,将模拟结果同实验结果进行比较,模型模拟值与实验实测值吻合得较好。采用单因素局部扰动分析方法,分别对HYDRUS-1D模型中入渗水量、土壤容重、纵向弥散度和PFCs在土壤介质中的吸附系数等参数进行扰动,并与参数原值结果进行比较,计算敏感系数,结果表明入渗水量、土壤容重和吸附系数是影响PFCs在土壤中迁移的主要因素。To better understand the migration of perfluorinated compounds(PFCs)in the soil and provide evidence for groundwater pollution prevention,perfluorobutyric acid(PFBA),perfluorohexanoic acid(PFHxA),perfluoroheptanoic acid(PFHpA),perfluorooctanoic acid(PFOA),perfluorononanoic acid(PFNA),and perfluorooctane sulfonate(PFOS)were research subjects in this study.A one-dimensional soil column laboratory experiment was conducted to simulate the migration of PFCs.A soil water flow model and solute transport model were established using the Hydrus-1D model to simulate migration in the column experiment.The research results showed that the simulated values from the model coincided with the experimental data very well.Disturbing the water infiltration amount,soil bulk density,longitudinal dispersion,and Kd of PFCs in the Hydrus-1D model via the single factor local disturbance analysis method,comparing with the result of parameter original value and calculating sensitivity coefficient,the research results indicated that the water infiltration amount,soil bulk density,and sorption coefficient were the main influencing factors in the migration of PFCs in the analyzed soil test.

关 键 词：PFCS HYDRUS-1D模型 土壤 迁移 

分 类 号：X523[环境科学与工程—环境工程]